JP2004241104A5 - - Google Patents

Claims (19)

A digital video recorder capable of recording video data on a selected recording medium of a first recording medium and a second recording medium,
An abnormal state detecting means for detecting the abnormality when an abnormality occurs suddenly during recording of data on the first recording medium;
With
The abnormal state detecting means detects a tracking abnormality from a level of a tracking error signal during a tracking operation for the first recording medium,
In the middle of recording the data on the first recording medium, when the abnormal state detecting means detects the abnormality, the recording of the data to the first recording medium is stopped, and the first recording medium is recorded. A digital video recorder for recording data to be recorded on the second storage medium.   2. The digital video recorder according to claim 1, wherein after the abnormal state detecting means detects the abnormality, it further detects that the abnormality has been resolved, and resumes recording of data on the first recording medium.   After the data to be recorded on the first recording medium is distributed and recorded on the first and second recording media, the data recorded on the second recording medium is read from the second recording medium, The digital video recorder according to claim 1 or 2, wherein recording is performed in an empty area of the first recording medium.   After the data to be recorded on the first recording medium is distributed and recorded on the first and second recording media, the data is read from the first and second recording media and recorded on another recording medium. A digital video recorder according to claim 1 or 2.   Means for appropriately switching between data read from the first recording medium and data read from the second recording medium based on management information recorded on the second recording medium and address information obtained from a reproduction signal; The digital video recorder according to claim 3 or 4. The first recording medium is an optical disc;
6. The digital video recorder according to claim 1, wherein the second recording medium is a hard disk or a semiconductor memory. The first recording medium and the other recording medium are optical discs;
6. The digital video recorder according to claim 4, wherein the second recording medium is a hard disk or a semiconductor memory. The digital video recorder according to claim 1, wherein the abnormal state detection means detects a state in which the acceleration of the digital video recorder exceeds a predetermined value as abnormal. The digital video recorder according to claim 6 or 7, wherein the abnormal state detection means detects a state where a reproduction signal obtained from the first recording medium is lower than a predetermined level as the abnormal state . The first recording medium is a replaceable type,
The digital video recorder according to claim 1, wherein the second recording medium is a fixed type.   The digital video recorder according to claim 1, wherein the data recorded on the first storage medium is broadcast data.   The digital video recorder according to claim 11, further comprising a tuner that receives the broadcast data. It has an image sensor,
The digital video recorder according to any one of claims 1 to 10, wherein the data recorded in the first storage medium is data output from the imaging device.   2. The digital video recorder according to claim 1, wherein the data to be recorded on the first recording medium is recorded on the second recording medium after being delayed by a predetermined time.   The digital video recorder according to claim 1, further comprising a dummy data generation circuit for recording dummy data on the first recording medium during a period in which the data is recorded on the second recording medium.   The digital video recorder according to claim 1, wherein identification information uniquely associated with at least a part of data recorded on the first recording medium is added to data recorded on the second recording medium.   The digital video recorder according to claim 16, wherein a logical address of data recorded on the second recording medium has continuity with a logical address of data recorded on the first recording medium. A method of driving a digital video recorder capable of recording video data on a selected recording medium of a first recording medium and a second recording medium,
A step of detecting an abnormality that occurs suddenly during the recording of the data on the first recording medium;
Detecting a tracking abnormality from a level of a tracking error signal during a tracking operation on the first recording medium;
Stopping the recording of the data on the first recording medium when the abnormality is detected, and recording the data to be recorded on the first recording medium on the second storage medium;
Including methods. A program incorporated in a microprocessor in a digital video recorder capable of recording video data on a selected recording medium of the first recording medium and the second recording medium,
For the microprocessor,
In middle of recording the data on the first recording medium, comprising the steps of: detecting a sudden abnormality occurred,
Detecting a tracking abnormality from a level of a tracking error signal during a tracking operation on the first recording medium;
Stopping the recording of the data on the first recording medium when the abnormality is detected, and recording the data to be recorded on the first recording medium on the second storage medium;
A program that executes